Value of Business Acquired, Deferred Acquisition Costs and Deferred Sales Inducements - Summary of Changes in Carrying Amounts of Intangible Assets Including DAC, VOBA and DSI (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Total
Balance at beginning of period	$ 2,034	$ 1,724
Deferrals	372	322
Amortization	(282)	(232)
Interest	26	20
Unlocking	6	17
Adjustment for net unrealized investment (gains) losses	782	(47)
Purchase price allocation adjustments		61
Balance at end of period	2,938	1,865
VOBA
Total
Balance at beginning of period	1,185	1,466
Deferrals	0	0
Amortization	(177)	(204)
Interest	13	15
Unlocking	2	16
Adjustment for net unrealized investment (gains) losses	577	(15)
Purchase price allocation adjustments		61
Balance at end of period	1,600	1,339
DAC
Total
Balance at beginning of period	761	222
Deferrals	334	278
Amortization	(80)	(16)
Interest	12	5
Unlocking	(1)	0
Adjustment for net unrealized investment (gains) losses	156	(27)
Purchase price allocation adjustments		0
Balance at end of period	1,182	462
DSI
Total
Balance at beginning of period	88	36
Deferrals	38	44
Amortization	(25)	(12)
Interest	1	0
Unlocking	5	1
Adjustment for net unrealized investment (gains) losses	49	(5)
Purchase price allocation adjustments		0
Balance at end of period	$ 156	$ 64